Seventh International WMO Symposium on Data Assimilation

Worldwide established and early career scientists are convening in Brazil to address the challenges and trigger innovations on advanced data assimilation methods for a wide spectrum of applications in atmospheric, oceanic and earth system science.

Symposium Goals

In the Symposium the state of the art of data assimilation for weather and climate prediction will be presented. The aim of the Symposium is to gather a worldwide representation of well established scientists as well as early career scientists to create opportunities of discussion, to establish common areas of interest and future mutual collaborations to advance data assimilation.

Data assimilation themes include advancing assimilation methodologies and ensemble data assimilation methods; assessment of model and assimilation systems uncertainties; data assimilation performance assessment and diagnostic tools used; couple-state (atmosphere/ocean, atmosphere/land, atmosphere/cryosphere) data assimilation methodology; polar and tropical data assimilation issues and solvers; impact assessment of the observations used and observations needed in the future; representation of high-impact weather phenomena from tropical cyclones to urban smog; convective scale data assimilation methodology and observations; assimilation of different atmospheric constituents.

Themes in summary:

  • - Global and Regional Atmospheric
  • - Convective Scale
  • - Atmospheric Constituent
  • - Coupled
  • - Global and Regional Ocean
  • - Assimilation of Observations to Represent the Land Surface Evolution
  • - Assimilation of Space-Based Remote Sensing, Ground-Based Remote Sensing and in Situ Observations
  • - Methodology
  • - Assimilation System Performance Diagnostic

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Global and Regional Atmospheric

(e.g. troposphere, stratosphere, high impact weather, reanalysis)

Convective Scale

(e.g. to initialize high resolution NWP, nowcasting, high impact weather)

Atmospheric Constituent

(e.g. stratospheric and tropospheric composition, aerosols, air quality, reanalysis)


(e.g. atmosphere/land, atmosphere/ocean, ocean/wave, land/ocean/sea-ice, carbon cycle, reanalysis, initializing seasonal to decadal predictions)

Global and Regional Ocean

(e.g. coastal, reanalysis, operational oceanography, salinity, ocean chlorophyll, biogeochemical)

Assimilation of Observations to Represent the Land Surface Evolution

(e.g. novel variables such as soil moisture, skin temperature)

Assimilation of Space-Based Remote Sensing, Ground-Based Remote Sensing and in Situ Observations

(e.g. new observation operators, observation and model bias correction, observation and model error variance specification, future network design and observation impact, adaptive observational thinning, observations use in cloudy and precipitating areas)


(e.g. improvements to existing variational, EnKF, and hybrid methods; new approaches for estimating error covariances; techniques for highly non-Gaussian systems; long window/weak constraint; new methods for optimizing re-analyses; variational/ensemble parameter estimation; improving scalability of DA methods; other advanced techniques including those tested with idealized systems)

Assimilation System Performance Diagnostic

(e.g. observation influence, observation departures, analysis residuals, analysis uncertainties, observation forecast departures, adjoint and ensemble forecast sensitivity observation impact, observation system experiment, observation simulation system experiment, observation impact monitoring for climate applications)


Important Dates

  • 6 March 2017: Abstract Submission Open
  • 14 April 2017: Abstracts Due
  • 27 April 2017: Abstracts Due
  • 16 June 2017: Abstract Notification Sent
  • 31 July 2017: Early Bird Registration
  • 31 August 2017: Last Day for Hotel Booking
  • 05 September 2017: Final Program
  • 11-15 September 2017: Symposium

Registration Fees

Until July 31, 2017 After August 1st, 2017 On-Site
Participant US$ 200 US$ 250 US$ 300

Abstract Fee

Abstract Fee US$ 20

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Registration/Abstract Submission

Authors are invited to submit abstracts (800 words - max 1 page A4) in electronic form until 27 April 2017. Submitted abstracts should include title, authors, address, body of abstract, and six key words. Please list the full first and last names of each author. Abstracts must concisely describe the study or topic in detail.


With the aim to gather presentations that represent the most innovative ideas and developments in data assimilation, and also with the aim to offer opportunities to early career scientists and scientists from less developed countries, a set up of equal length oral presentations has been chosen from the submitted abstracts. The Symposium program consists of seventy-five 20' talks and one-hundred-fifty posters that represent the state of the art in data assimilation methodologies and applications. A plenary session is organized on the last day of the Symposium to provide a summary of the main achievements shown in this field and suggestions for further investigations and opportunities for improvements.


Scientific Steering Committee

  • Carla Cardinali, Co-Chair
  • Daryl Kleist, Co-Chair: NOAA/NWS/NCEP
  • -
  • Tom Auligne (JCSDA)
  • Mark Buehner (Env. Canada)
  • Nadia Fourrie (Meteo France)
  • Stefan Klink (DWD)
  • Ulrich Lohnert (Univ. Koln)
  • Sharan Majumdar (Univ. of Miami)
  • Saroja Polavarapu (Env. Canada)
  • Juan Ruiz (CIMA-UBA, Argentina)
  • Bin Wang (Chinese Academy of Sciences)

Local Organizing Committee

  • Dirceu Herdies, Co-Chair: CPTEC/INPE
  • Luis Gustavo Gonçalves, Co-Chair: CPTEC/INPE
  • -
  • Antonio Divino Moura - CPTEC/INPE
  • Cesar Augustus Beneti - SIMEPAR
  • Fabricio Harter - UFPEL
  • Francisco de Assis Diniz - INMET
  • Mario Francisco Leal de Quadro - IFSC
  • Pedro Leite da Silva Dias - IAG/USP

Venue and Hotel Reservation

Access the Costão do Santinho hotel site:

Hotel Reservation: Full Board included – US$ 142 per Night - Make your reservation: here.

Getting to Florianópolis

By Air

Florianopolis has its own airport, Hercilio Luz Airport, located on the island. All major Brazilian airlines fly to Florianopolis. If you are flying from outside of the country, it is likely that you will have to make a connection, probably in Sao Paulo or Rio de Janeiro. Make sure when you are booking your flight that your connecting flight to Floripa leaves from the same airport as your arriving flight, as both cities have more than one major airport, and transfering between them can be a great hassle. GOL airlines is a cut-rate airline company similar to Ryanair and EasyJet that flies to Florianopolis.

The best way to get from the airport to your hotel is by taxi. Taxi drivers in Florianopolis are honest and reliable. The ride from the airport into town costs about R$60 ($30 USD). There is also frequent local bus service to the downtown terminal via green busses marked "183 Corredor Sudoeste." Take those marked "Directo" with a placard in the window to avoid most intermediate stops in either direction. The fare is R$2.70 or about $1.25 USD.

By Bus

Overnight buses are available to travel to Florianopolis from both Rio and Sau Paulo. The trip takes about ten hours from Sao Paulo, and eighteen from Rio. You can pay a little more to upgrade to a sleeper bus, which is more comfortable. From Sao Paulo, a standard bus costs around R$70, and a sleeper bus costs about R$120. From Rio the cost is about R$142.

Travel Grants

Junior scholars, senior graduate students and scholars from low-income countries are encouraged to apply to travel assistance before May 10th, 2017. Please, after submitting your abstract, send an email to with the subject “Travel Grant Request”, along with a short CV, one paragraph stating your current research and a letter of reference.

Award decisions will be announced in mid-June.

Please Note: You are not required to Register for the Symposium to apply for a travel grant but an abstract has to be submitted before apply. If you receive a grant you will be required to register for the Symposium by our September 1st, 2017 registration deadline.

*Travel grants are subject to funding availability.


Visa Entrances in Brazil

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Other (Unofficial) Information





Dirceu Herdies

Tel.: +55 (12) 3186-8565

Luis Gustavo Gonçalves

Tel.: +55 (12) 3186-7963